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CVE-2016-6259
Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery,…
Medium6.2EPSS 0.64%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check.
Timeline
ID reserved
By mitre
- 13 days later
· 13 days later
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium6.2 | CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.64% · top 49% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.2.
Weakness
Affected products
n/a
- affected n/a
References (6)
- 92130 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://support.citrix.com/article/CTX214954 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1036447 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- http://xenbits.xen.org/xsa/xsa183-unstable.patch (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://xenbits.xen.org/xsa/advisory-183.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://xenbits.xen.org/xsa/xsa183-4.6.patch (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-6259)Record last updated .